Fluid flow control device



Sept. 22, 1959 R. B. MATTHEWS 2,905,189

FLUID FLOW CONTROL DEVICE Filed April 25, 1955 r0 L\ 526 226 a 236 E 68I 1/ j. a6

873 as F 300.

305 1:5 k W o. .50 l 42 1@ I 5 "-5 v 24 8 82 E: 70 46 1 INVENTOR.

Russell 5 NQZZfied/S pgckurfllb-ach United States Patent FLUID FLOWCONTROL DEVICE Russell B. Matthews, Wauwatosa, Wis., assignor to BasoInc., Milwaukee, Wis., a corporation of Wisconsin 9 A Application April25, 1955, Serial No. 503,680

16 Claims. c1. 137'66) .vide a safety shut-off of the entire apparatus.

It is a general object of the present invention to provide an improvedfluid flow control device of the character set forth wherein control offluid flow by both a safety shut-off device and by a manually operableplug valve is provided in a single compact device as distinguished fromthe large or several devices heretofore required for such control.

Another object of the invention is to provide an improved control deviceof the character described wherein the safety shut-off device isdisposed coaxially within a plug ty-pe valve member to afford theaforementioned compactness and to permit disposition of manual resettingmeans for said device and manual operating means for said plug valvemember in close proximity to each other to facilitate manual actuationthereof.

Another object is to provide a control device of the character describedwherein the safety shut-off means provides main burner fuel flowinterruption during resetting and 100% safety shut-off of the fuel, andthe plug valve member is actuatable to interrupt all fuel flow asdesired to thereby shut-off all of the burners independently of saidsafety shut-off device.

A.more specific object is to provide a device of the character set forthwherein the safety shut-off device comprises an electromagnet and'coacting armature, there being means fixed to said device to permitsaid plug valve to be rotated without causing rotation of said shut-offdevice, thereby protecting the lead connections for said electromagnet.

Another specific object is to provide a fluid flow control device of theclass described wherein the electromagnet and armature are both movable,movement of said armature to said magnet providing actuation of a pilotvalve to afiord fuel flow to a pilot burner for ignition thereof,retraction of said armature coupled to said magnet moving a main fuelvalve to open position for fuel flow to both a main burner and saidpilot burner, said plug valve providing manual shut-off of all fuel flowto both of said burners independently of said main and pilot valves.

' Another object of the invention is to provide an improved controldevice of the character set forth wherein actuation of the resettingmechanism holds the main fuel valve of the safety shut-oif device and apilot fuel valve closed, and also holds an auxiliary pilot fuel by-passvalve open, whereby fuel flow to only the pilot burner is permittedduring resetting, continuation of pilot fuel flow upon release of thereset mechanism being dependent Patented Sept. 22, 1959 upon actuationof said main and pilot fuel valves to open position on said release, theconstruction of said safety shut-off device being such that the mainfuel valve cannot be opened unless the pilot burner is ignited.

Another object of the invention is the provision in a control device ofthe character set forth, of a valve body having main and pilot fuelpassages interconnected downstream from the main fuel valve so that fuelflow through both of said passages is controlled by said main valve,there being an auxiliary passage communicating with said main fuelpassage upstream of said main valve and a double acting pilot valveinterposed in said pilot fuel and auxiliary passages, said pilot valveincluding a normally closed first valve member in said auxiliary passageand a connected normally open second valve member in said pilot fuelpassage, pilot fuel flow being initiated by movement of said first valvemember to open position, to permit pilot fuel flow through saidauxiliary passage into said pilot fuel passage, said second member beingsimultaneously moved to closed position to prevent fuel flow throughsaid pilot fuel passage to the main burner through the main fuel passagedownstream of said valve seat, subsequent opening of said main valveproviding fuel flow to said main burner through said main passage, andreturn of said first and second valve members to their normal positionsproviding pilot fuel flow into said pilot fuel passage past saidnormally open second valve member as long as said main valve is open.

The novel features which I consider characteristic of my invention areset forth with particularity in the appended claims. The device itself,however, both as to its organization and mode of operation, togetherwith additional objects and advantages thereof, will best be understoodfrom the following description of a specific embodiment when read inconnection with the accompanying drawing, in which:

Figure l is a sectional view of a flow control device embodying thepresent invention and schematically showing the control device connectedto main and pilot bumers and to a thermoelectric generator;

Figure 2 is a fragmentary top view of the device of Figure 1 showing thevarious operating positions of the plug valve and operating meanstherefor; and

Figure 3 is an enlarged fragmentary vertical sectional view of a portionof Figure 1 showing the structural details of the double acting pilotfuel valve.

Like reference characters indicate corresponding parts throughout theseveral views of the drawings.

Referring to Figure 1, numeral 10 designates a valve body formed with aninlet chamber 12, an outlet chamber 14 and an intermediate chamber 16.Contiguous sections of a conduit 18 for supplying fuel to a main burner20 are connected to the valve body 10 in communication with inletchamber .12 and outlet chamber 14. The valve body 10 is further formedwith a pilot fuel passage 22 comprising a passage 22a and pilot fueloutlet chamber 22b separated by a pilot valve chamber 220. Fuel issupplied to a pilot burner 26 through a fuel supply conduit 24 fixed tovalve body 10 in communication with pilot outlet chamber 22b, said pilotburner being disposed in igniting proximity to the main burner 20 asshown in Figure 1.

The valve body 10 is formed also with a relatively large tapered bore 28for receipt of a frusto-conically shaped plug valve 30. Although Iprefer to employ a rotatable plug valve 30 having substantially theshape shown in Figure 1, it is believed readily apparent that rotatablevalve members of other shapes and configurations may be used, it merelybeing necessary for the present invention, that valve 30 and the bore inwhich it is seated have complemental surfaces to provide gas tightseating engagement therebetween and that valve member 30 be movablebetween several controllingpositions within valve body 10.

A cover plate 32 fastened to valve body by any appropriate means "suchas screws 34; is utilized to enclose 'opening*'28;' said cover plate32"being'iformed with' an opening 32a for extension therebeyond of arroperating handle 30a for-'pl ug-*valve 30. Coiledcompression spring- 36is interposedbetween plate 32 and plug valve hereinafter appearin-thediscussion of theoperation of the present invention.

An electromagnetic power unit'38 is disposed within the opening 300 ofthe-plug valve 30and-comprises an enclosure- 39 having an end wall 39ato which a U-shaped electromagnetcore member 40 is rigidly-fixedas-byany well known means such as valve-stem 42. A valve member 44 ispivotallymounted'on the valve stem-42 and cooperates with av'alveseat 46to control the flowof fuelbetweenthe intermediate chamber '16 and theoutlet chamber 14. .The power unit-38 also comprises an energizingwinding 48 twound about the leg portions of the U shaped coremember-40.-'One end-of the winding 48 is grounded tothe valve stem 42, and theother end is fixed-toalead connector 49 which extendsthrough an openingin the end wall-39a and is connected in circuit with a terminal 50insulatedly extending through a. wall portion of the valve body 10 andhaving a portion exposed within an external connector-socket 85- asshown in. Figure 1. Mounted adjacent pilot burner 26, is a[thermoelectric generator 52 shown schematically in Figure 1 and. havingahot junction- 52a and cold junctions 52b; saidnthermoelectricgenerator-being connected in circuit. with terminal 50:;and hence withelectromagnet winding.48 through a conductor 86.

The enclosure 39 has a centrally apertured' end wall 3% oppositeithe endwall-39a and fixed-in the aperture thereof .is a grommet or-bearing-SS.-An armature stem 56 is axially slidable in the bearing 58, and fixedthereto within the enclosurei39 is-an armature 54 which is cooperablewith the electromagnet core- 40. A reset button \60 is rigidlyfixedttothe armature stern-56 and is axially slidable in a bore 87extending axially through the handle portion 30a of theplug valve30.-:In order to prevent escape offluid fuel. around reset button 60,1prefer to employ an O-ring 88v withina groove-therefore in the bore 86as shownrin'Figure 1.

The pilot valve chamber 22c. .isprovided with valve seats 62 :and 64,the latter being formed in valve body 10. The valve seat 62 preferablysurrounds a central aperture 89 in a plug 90 threaded into one end ofthe chamber.22c and separating thevlatter from the intermediate chamber16. The aperture 89 functions as an auxiliary pilot fuel by-pass passageas will hereinafter appear. Disposed within the. chamber 22c is acup-shaped double acting. valve member 70 comprising connected valvemembers 66 and 568 which cooperate respectively with the seats62 and 64.v The valve members 66 and 68 are alterrnatively engageable .with ttheirrespective valve seats. .Interposed between valve members 70 and valvebody 10 is a compression spring 72 biasing the valve member 66 towardengagement with valve seat 62 and biasing the valve member 68 away fromthe valve seat 64. A compression spring 74-having a spring strength'greater'than 'thatof compression spring 72 is positioned within'thevalve member 70 as shown in Figure 1 for; apurpose which willhereinafter appear.

1Rigidly secured toarmature. stem,- 56pis ,an. L-shaped cam or,actuating; member 76,.having an extended portion 16a .disposed for..recipro catory; sliding movement in a longitudinal groove 91 formed inthe bore 300. In one position of-the'plug valve member 30 the portion76a of member 76 is aligned with the aperture 89 and is movabletherethrough into engagement with the spring 74 for actuation of thedouble acting pilot valve 70 during depression of the reset button 60.

Interposed between cam member 76 and the end wall 39b of enclosure 39 iscompression spring 78 which biases thearmature" 54' andthe,electromagnetic core 40 toward separated relation and provides firmseating engagement of ,the'valve member 44 on'the seat146 whenever saidarmature and core member are in separated relation. jThespring; 78 alsobiases the "member .76 and the reset button 60 toward the releasedpositons shown. A compression spring 80- which is-substantially weakerthan the spring 78 is interposed between valve body 10 and the end wall39a of enclosure 39 to move the valve member 44 to flow-permittingposition and the member 76 and reset button to-releasedpositions uponrelease of said'resetbutton following depression of-the latterand-electromagnetic coupling'of armature member'54 and coremember 40.

'In order to prevent-twisting and possible breakage of the leadconnector' 49; I prefer to employ stop'means in the form-of a tang- 82fixed to'the enclosure 39 and having an end-portion positioned within aslot- 10a formed in valve body 10 toprevent rotation of theenclosure 39irrespective of rotation-of plug valve 30.

Further, Ipreferto 'employindicator means such as pin 84 fixed to plugvalve 30 and movable within a'siot 32b formed in'the cover plate 32 toindicate to an-operator theposition of said plug valve 30.

The operation of the embodiment of the invention shown in the drawing isas follows:

With'plug valve 30 and each of valve members 44 and 66 inflow-preventing position, all fuel flow to themain and pilot-burnersis=shut off, and the firststep-in affording ignition of the pilotburner" 26 and main burner-20, is to rotate plug valve-'30 untii'pin84-engages the end of slot 32b designated "reset-on. In-this positionofplug valve 30.fuel is permitted'to flow to-intermediate chamber 16through inlet chamber 12 and valve port 30b; and the portion 76aof-theactuating member '76 is aligned with the aperture 89. Thereafter, inorder to afford fuel How. to the pilot burner "26' for ignition thereof;it-is merely necessary to manually depress the reset button 60,thereby-moving thevalve member to'its flowpermitting position andcausing :the armature member 54 to be moved to its attracted positionwith respect to electromagnet coremember 40 against thebias ofspring 78.Fuel can-now flow :from intermediate chamber: 16 through the aperture89,v pilot valve chamber 220, pilot outlet chamber22b. and conduitil24to pilot burner-26, Where it may be ignited: in any Well known manner.Depression of reset button 60, in-additionto openinguvalve member 66moves the valve member 68 to itsflow-preventing position to preventfuel; flow from pilot. .valve chamber 22c to main burner 20 throughpassage 22a and outlet chamber 14. The aforementioned-movement ofvalvemembers x66 and .68 is afforded by depressing engagement oftheextended portion 76a of camrnember 76 with compression spring 74 wherebythe manual force exerted on-reset button 60 is transmitted to valvemember 70. The spring 74 permits the extended portion 76a to continue tomove following seating of, the valve member 68 on-the seat 64, therebyinsuring firm contact between armature 54 and electromagnet core member40 as the latter are reset to attracted position by-depression of thebutton 60.

Ignition of the fuel at the pilot burner 26 causes-the flame-thereof toheat the hot junction, 52a,of' therm0- electric generator 52, whereuponthe latter generates an .electriccurrent which. flowsthroughelectromagnet winding 48. and effects magnetic coupling of-thearmaturemember 5412\nd. core member 40 which are, in attracted relation. Releaseof reset button '60 while the armature and core member are thus coupledpermits the compression spring 80 to move said coupled armature and coremember axially within the plug 30 to retracted position (not shown) andto simultaneously move the valve member 44 to its flow-permittingposition. Movement of armature to its retracted position returns thevalve member 66 to its flow-preventing position and the valve member 68to its flow-permitting position. However, in order to maintaincontinuous fuel flow to pilot burner 26 throughout the aforementionedretractile movement of the armature, the valve member 44 is moved to itsflowpermittingposition prior to return of the valve member 66 to itsflow-preventing position.

, With the reset button 60 in its released position and the coupledarmature and core in retracted positions, fuelis permitted to flow fromthe intermediate chamber 16 into the outelt chamber '14, and through thepilot fuel passage 22 and conduit 24 to the pilot burner 26. Fuel alsoflows from the outlet chamber 14 through the conduit 18 to main burner20, and the fuel emitted at the main burner 20 is ignited by the flameof the pilot burner 26. The fuel burning apparatus utilizing the subjectinvention is thereby placed in operating condition. Upon extinguishmentof the flame of the pilot burner 26, hot junction 52a of thermoelectricgenerator 52 is cooled by the surrounding atmosphere, therebydeenergizing electromagnet winding 48 and reducing the attractive forcegenerated thereby, whereupon the compression spring 78 overcomes saidattractive force and the force of the compression spring 80 and returnsthe core member 40 to separated relation with respect to armature member54 and valve member 44 to seating engagement with valve seat 46, therebyterminating fuel flow to both of said main and pilot burners.

If it is desired to render the fuel burning apparatus inoperativeindependently of the main fuel valve 44 and pilot fuel valve 70, forexample while pilot burner 26 is ignited, it is merely necessary torotate plug valve 30 by means of the operating handle 30a so that pin 84is aligned with the designation off. In this position of the plug valve30 communication between inlet chamber 12 and intermediate chamber 16 isinterrupted, and all fuel flow to both pilot burner 26 and main burner20 is shut 01f.

Although I have shown and described certain specific embodiments of myinvention, I am fully aware that many modifications thereof arepossible. My invention, therefore, is' not to be restricted exceptinsofar as is necessitated by the prior art and by the spirit of theappended claims.

A What is claimed as the invention is:

l'.:L-Ina fluid flow control device, in combination, firstand;secondflow control members each being movable between. controllingpositions, operating means for said control'member's, comprising a firstmovable member operatively associated with said first flow controlmember, a second movable member operatively associated with said secondflow control member, said movable members being biased to separatedrelation, said first movable member being movable against said bias froman initial position'to a second position in attracted relation wtihrespect to: said second movable member to eifect movement of said firstcontrol member. from one to another of its controlling positions; meansfor coupling said first and second movable members when in saidattracted relation, means. biasingsaid coupled members toward theinitial position'of said first movable member to eflect by movementofsaid coupled members under said bias, movement of said second controlmember from one to another of its controlling positions and return ofsaid first control member to its said one controlling position, acontrol valve formed. with an opening within which said operating meansis positioned, and means in said opening associated with :said controlvalve and said first movable. member to 6 render the latter inoperativeto efiect movement of said first control member from one to another ofits controlling positions with movement of said first movable memberfrom its initial position to its second position exceptwhen said controlvalve is in a predetermined one of its controlling positions.

2. In a fluid flow control device, in combination, a valve body, firstand second flow control members within said body each being movablebetween controlling positions, operating means for said control members,comprising a first movable magnetic member operatively associated withsaid first flow control member, a second movable magnetic memberoperatively associated with said second flow control member, saidmagnetic members being biased to separated relation, said first magneticmember being movable against said bias from an initial position to asecond position in attracted relation with respect to said secondmagnetic member to effect movement of said first control member from oneto another of its controlling positions, an energizing winding on one ofsaid magnetic members energizable to couple said first and secondmagnetic members when in said attracted relation, means biasing saidcoupled magnetic members toward the initial position of said firstmagnetic member to effect by movement of said coupled magnetic membersunder said bias, movement of said second control member from one toanother of its controlling positions and return of said first controlmember to its said one controllingposition, a rotatably operable controlvalve formed with an opening within which said operating means is positioned, and means in said opening associated with said control valve andsaid first magnetic member to render the latter inoperative to effectmovement of said first control member from one to another of itscontrolling positions with movement of said first magnetic member fromits initial position to its second position except when said controlvalve is in a predetermined one of its controlling positions.

3. In a fluid flow control device, in combination, a valve body, firstand second flow control members within said body each being movablebetween controlling positions, operating means for said control members,comprising a first movable member operatively associated with said firstflow control member, a second movable member operatively associated withsaid second flow control member, said movable members being biased toseparated relation, said first movable member being movable against saidbias from an initial position to a second position in attracted relationwith respect to said second movable member to effect movement of saidfirst control member from one to another of its controlling positions,means for coupling said first and second movable members when in saidattracted relation, means biasing said coupled members toward theinitial position of said first movable member to effect by movement ofsaid coupled members under said bias, movement of said second controlmember from one to another of its controlling positions and return ofsaid first control member to its said one controlling position, arotatably operable control valve having an opening formed symmetricallyof theaxis of rotation of said valve, said operating means beingpositioned within said opening, means in said opening associated withsaid control valve and said first movable member to render the latterinoperative to effect movement of said first control member from one toanother of its controlling positions with movement of said first movablemember from its initial position to its second position except when saidcontrol valve is in a predetermined one of its controlling positions,and means preventing relative rotational movement between one of saidmovable members and said valve body during rotational movement of saidvalve.

4. In a fluid flow control device, in combination, a valve body, firstand second flow controlmembers within said .body each being movablebetween-controlling positions5---' operating means for said control,members, comprising afirst movable magnetic member operativelyassociated with said first flow control member, a second movablemagnetic, member operatively associated with said second flow controlmember, said magnetic members being biased to separated relation, saidfirst magnetic member being movable against said bias from an initialposition to a second position in attracted relation with respect to saidsecond magnetic member to effect movement of said first control memberfrom one to another of its control-ling positions, an energizing windingon one of said magnetic members including circuit connection means fixedto said valve body and energizable to couple said first and secondmagnetic members when in said attracted relation, means biasing saidcoupled magnetic members toward the initial position of said firstmagnetic member to efiect by movement of said coupled magnetic membersunder said bias, movement of said second control member from one toanother of its controlling positions and return of said first controlmember to its said one controlling position, a rotatably operablecontrol valve having an opening formed symmetrically of the axis ofrotation of, said valve, said operating means being positioned withinsaid opening, means in said opening associated with said control valveand said first magnetic member 'to render the latter inoperative toeffect movement of said first control member from one to another of itscontrolling positions with movement of said first magnetic member fromits initial position to its second position except when said controlvalve is in a predetermined one of its controlling positions, and meansinterposed between said valve body and said operating means preventingrelative rotational movement between said one of said magnetic membersand said valve body during rotational movement of said valve to preventundue strain on said energizing winding circuit connection means duringsuch movement of said valve.

5. In a fluid flow control device, in combination, a valve body havingfirst, second and auxiliary fluid passages, a first flow control memberfor control of fluid flow through said first and second fluid passages,a second flow control member in said second fluid passage biased toflow-permitting position, an auxiliary flow control member in saidauxiliary fluid passage biased to flow-preventing position, operatingmeans for said control members, comprising a first movable memberoperatively associated with said first flow control member, a secondmovable member operatively associated with said second and auxiliaryflow control members, said movable members being biased to separatedrelation whereby said first flow control member is biased toflow-preventing position, said second movable member being movableagainst said bias from an initial position to a second position inattracted relation with respect to said first movable member to effectmovement of said second control member from flow-permitting toflow-preventing position and said auxiliary control member fromflow-preventing to flow permitting position, means for coupling saidfirst and second movable members when in said attracted relation, meansbiasing said coupled members toward the initial position or said secondmovable member to effect by movement of said coupled members under saidbias, movement of said first control member from flow-preventing toflow-permitting position, return of said second control member to itsflow-permitting position and return of said auxiliary control member toits flow-preventing position, a rotatably operable control valve in saidvalve body having an opening formed symmetrically of the axis ofrotation of said valve, said operating means being positioned Withinsaid opening, actuating means on said valve for effecting movement ofsaid. second movable member to its said second position and for.effecting rotational movement of said control. valve independently ofsaid control members, means in said opening associated with said controlvalve and said second movable member to render the latter inoperae tiveto effect movement of said second and auxiliary control members withmovement of said second mov able member from its initial position to itssecond position, except when said control valve is in a predeterminedone. of its controlling positions, and means interposed between saidvalve body and said operating means preventing relative rotationalmovement between one of said movable members and said valve body duringrotational movement of said valve.

6. In a fluid flow control device, in combination, a valve body havingfirst, second and auxiliary fluid passages, a first flow control memberin said first and second fluid passages, a second flow control member insaid second fluid passage biased to flow-permitting position, anauxiliary flow control member in said auxiliary fluid passage biased toflow-preventing position, operating means for said control members,comprising a. first movable magnetic member operatively associated withsaid first flow control member, a second movable magnetic memberoperatively associated with saidsecond and auxiliary flow controlmembers, said movable magnetic members being biased to separatedrelation, whereby said first flow control member is biased toflowpreventing position, said second magnetic member being movableagainst said bias from an initial position to a second posit1on inattracted relation with respect to said first magnetic member to effectmovement of said second control member from flow-permitting toflow-preventing position and, said auxiliary control member fromflow-prevent-- ing to flow-permitting position, an energizing winding onone of said magnetic members energizable to couple said first and secondmagnetic members when in said attracted relation, means biasing saidcoupled magnetic members toward the initial position of said secondmagnetic member to eflect by movement of said coupled magnetic membersunder said bias, movement of said first control member fromflow-preventing to flow-permitting position, return of said secondcontrol member to its flow-permitting position and return of saidauxiliary control member to its flow-preventing position, a rotatablyoperable control valve formed with an opening within which saidoperating means is positioned, means in said opening associated withsaid control valve and said second magnetic member to render the latterinoperative. to effect movement of said second and auxiliary controlmembers with movement of said second magnetic member from its initialposition to its second position except when said control valve is in apredetermined one of its controlling positions, and' actuating means onsaid valve for effecting movement of said second magnetic member to itssaid second position and for effecting rotational movement of saidcontrol valve independently of said flow control members.

7. In a fluid flow control device, in combination, a valve body havingfirst, second and auxiliary fluid passages, a first flow control memberin said first and second fluid passages, a second flow control member insaid second fluid passage biased to flow-permitting position, anauxiliary flow control member in said auxiliary fluid passage biased toflow-preventing position, operating means for said control members,comprising a first movable electromagnet member operatively associatedwith said first flow control member, a second movable electromagnetmember operatively associated with said second and auxiliary flowcontrol members, said movable electromagnet members being biased toseparated relation whereby said first flow control member is biased toflow-preventing position, said second electromagnet member being movableagainst said bias from an initial position to a second position inattracted relation with respect to said first electromagnet member toeffect movement of said second control member from flow-permitting toflow-preventing position and; said auxiliary control member fromflow-preventing to flow-permitting position, an electromagnet winding onone of said electromagnet members including circuit connection meansfixed to said valve body and energizable to couple said first and secondelectromagnet members when in said attracted relation, means biasingsaid coupledvelectromagnet members toward the initial position of saidsecond electromagnet member to eifect by movement of said coupledelectromagnet members under said bias, movement of said first controlmember from flow-preventing to flow-permitting position, return of saidsecond control member to its flow-permitting position and return of saidauxiliary control memher to its flow-preventing position, a rotatablyoperable control valve formed with an opening within which saidoperating means is positioned, means in said opening associated withsaid control valve and said second electromagnet member to render thelatter inoperative to eflfect movement of said second and auxiliarycontrol members with movement of said second electromagnet member fromits initial position to its second position except when said controlvalve is in a predetermined one of its controlling positions, actuatingmeans on said valve for effecting movement of said second electromagnetmember to its said second position and for effecting rotational movementof said control valve independently of said flow control members, andmeans interposed between said valve body and said operating meanspreventing relative rotational movement between said one of saidelectromagnet members and said valve body during rotational movement ofsaid valve to prevent undue strain on said electromagnet circuitconnection means during such movement of said valve.

'8. In a fluid flow control device, in combination, a valve body havingfirst, second and auxiliary fluid passages, a first flow control memberfor control of fluid flow through said first and second fluid passages,a second flow control member in said second fluid passage biased toflow-permitting position, an auxiliary flow control member in saidauxiliary fluid passage biased to flow-preventing position, operatingmeans for said control members, comprising a first movable memberoperatively associated with said first flow control member, a secondmovable member operatively associated with said second and auxiliaryflow control members, said movable members being biased to separatedrelation whereby said first flow control. member is biased toflow-preventing position, said second movable member being movableagainst said bias from an initial position to a second position inattracted relation with respect to said first movable member to effectmovement of said second control member from flowpermitting toflow-preventing position and said auxiliary control member fromflow-preventing to flow-permitting position, means for coupling saidfirst and second movable members when in said attracted relation, meansbiasing said coupled members toward the initial position of said secondmovable member to effect by movement of said coupled members under saidbias, movement of said first control member from flow-preventing toflow-permitting position, return of said second control member to itsflowpermitting position and return of said auxiliary control member toits flow-preventing position, a rotatably operable control valve in saidvalve body having an opening formed symmetrically of the axis ofrotation of said valve, said operating means being positioned withinsaid opening, means in said opening associated with said control valveand said second movable member to render the latter inoperative toeffect movement of said second and auxiliary control members withmovement of said second movable member from its initial position to itssecond position except when said control valve is in a predetermined oneof its controlling positions, and means interposed between said valvebody and said operating means preventing relative rotational movementbetween one of said movable members and said valve body duringrotational movement of said valve.

9. In a fluid flow control device, in combination, a valve body havingfirst, second and auxiliary fluid passages, a first flow control memberfor control of fluid flow through said first and second fluid passages,a second flow control member in said second fluid passage biased toflow-permitting position, an auxiliary flow control member in saidauxiliary fluid passage biased to flow-preventing position, operatingmeans for said control members, comprising a first movable memberoperatively associated with said first flow control member, a secondmovable member operatively associated with said second and auxiliaryflow control members, said movable members being biased to separatedrelation whereby said first flow control member is biased toflow-preventing position, said second movable member being movableagainst said bias from an initial position to a second position inattracted relation with respect to said first movable member to ef fectmovement of said second control member from flowpermitting toflow-preventing position and said auxiliary control member fromflow-preventing to flow-permitting position, means for coupling saidfirst and second movable members when in said attracted relation, meansbiasing said coupled members toward the initial position of said secondmovable member to effect by movement of said coupled members under saidbias, movement of said first control member from flow-preventing toflow-permitting position, return of said second control member to itsflowpermitting position and return of said auxiliary control member toits flow-preventing position, a rotatably operable control valve in saidvalve body having an opening formed symmetrically of the axis ofrotation of said valve, said operating means being positioned withinsaid opening, and means in said opening associated with said controlvalve and said second movable member to render the latter inoperative toeffect movement of said second and auxiliary control members withmovement of said second movable member from its initial position to itssecond position except when said control valve is in a predetermined oneof its controlling positions.

10. A fluid flow control device comprising, a rotatable plug valvemember formed with a cavity, first and second flow control members eachmovable to controlling positions, operating means for said first flowcontrol member comprising cooperable relatively movable coupling membersdisposed within said cavity, said coupling members having separatedrelation and being movable to coupled relation, one of said couplingmembers being operatively associated with said second control member formoving the latter from one to another of its controlling positions byrelative movement of said coupling members toward coupled relation, andmeans in said cavity associated with said plug valve member and said onecoupling member for rendering the latter inoperative to effect movementof said second control member toward its said other controlling positionexcept when said plug valve member is in a predetermined position ofrotation.

11. A fluid flow control device comprising, a rotatable plug valvemember formed with a cavity, first and second flow control members eachmovable to controlling positions, safety shut-ofi means for said firstflow control member comprising cooperable relatively movable magneticcoupling members disposed within said cavity, said coupling membersbeing biased toward separated relation and one of said coupling membersbeing manually resettable against said bias into coupled relation withthe other coupling member, said one coupling member being operativelyassociated with said second control member for moving the latter fromone to another of its controlling positions by resetting movement ofsaid one coupling member, and means in said cavity associated with saidplug valve member and said one coupling member for rendering the latterinoperative to efiect movement of said second control member toward itssaid other controlling position except when said plug valve member is ina predetermined position of rotation.

12. A fluid fuel flow control device comprising a valve body formed witha plug receiving bore, a plug valve member rotatably seated in said hereand formed with a cavity, a valve member movable to controlling; posiations, operating means for said valve member compris-- ing a pair ofcooperable relatively movable, coupling membersdisposed within saidplug; cavity, means aflFord ing a connection between said couplingmembers and said plug valve member tending to cause rotation of both fsaid coupling members with said plug valve member, and means forpreventing rotation of one of said coupling members with rotation-ofsaid plug valve member.-

1-3'. A fluid fuel flow control device comprising a valve body formedwith a plug receiving bore, a plug valve member rotatably seated in saidbore and formed with a cavity, a valve member movable to controllingpositions, operating means for said valve member comprising a pair ofcooperable relatively movable coupling members disposed within said plugcavity, means affording a connection between said coupling members andplug valve member tending to cause rotation of both of said couplingmembers with said plug valve member, one of said coupling members beingprovided, with electrical connection means, and means for preventingrotationof said one coupling member with rotation of said plu-g valvemember and thereby affording protection to said electrical connectionmeans.

14. A fluid fuel flow control device comprising a valve body formed witha plug receiving bore, a plug valve member rotatably seated in said boreand formed with a cavity, a valve member movable to. controllingpositions electromagnetic operating means for said valve membercomprising cooperable electromagnet and armature coupling members.disposed within. said plug cavity and relatively movable coaxially ofsaid. plug valve mem-- ber to attracted and retracted positions, meansaffording a connection between said coupling members and said plug valvemember tending to cause rotation of both of said coupling members withrotation of said plug valve member and means for preventing rotation ofone of said electromagnet and armature members with rotation of saidplug valve member.

15. A fluid fuel flow control device comprising a valve body formed witha plug receiving bore and with a valve seat substantially coaxialtherewith, a plug valve member rotatably seated in said bore and formedwith a cavity, a valve member cooperable-with said seat, safety shut-offmeans for said valve member comprising an electromagnet and a cooperablearmature disposed within said plug cavity and relatively movablecoaxially of said plug valve member, said electromagnet being fixed to,said valve member for movement of the latter rectilinearly therewithtoward and away from said seat, means affording a connection between.said safety shut-off means and'saidplug valve member tending to causerotation of said: armature and electromagnet with. rotation of said plugvalve member, and means for preventing rotation of said electromagnetwith rotation of said plug valve member.

1 6. In a fluid flow control device, in combination, a valve body,firstand second flow. control members within said body each beingmovable between controlling positions, operating means for said controlmembers, comprising a first movable member operatively associated withsaid first flow control member, a second movable member operativelyassociated with said second flow control member, said movable membersbeing biased to separated relation, said first movable member beingmovable against said bias from an initial position to a second positionin attracted relation with respect to said second movable. member toeffect movement of said first control member from one to another of itscontrolling positions, means for coupling said first and second movablemembers when in said attracted relation, means biasing said coupledmembers toward the initial position of said first movable member toeffect by movement of said coupled members under said bias, movement ofsaid second con.- trol' member from one to another of its controllingpositions and return of said first control member to its said onecontrolling position, a rotatably operable control valve having an.opening formed symmetrically of the axis of rotation of said valve, saidoperating means being positioned within said opening, means affording aconnection between said movable members and said rotatable valve tendingto cause rotation of both of said movable members with rotation of saidrotatable valve, and means preventing relative rotational movementbetween one of said movable members, and said valve body duringrotational movement of said valve.

References Cited in the file of this patent UNITED STATES PATENTS2,290,108 Mantz July 14, 1942 2,395,470 Ewing Feb. 26, 1946 2,409,947Mantz Oct. 22, 1946 2,515,229 Jenkins July 18, 1950 2,705,532 ThornberryApr. 5, 1955

